Apparatus for rolling tubes and tubular bodies.



PATENTED FEB. 27, 1906 R. O. STIEPEL.

R BODIES.

APPARATUS FOR ROL LING TUBES AND TUBULA APPLIOATION FILED FEB. 27, 1904.

2 SHEETS-SHEET l.

$111111 ESS [menace RALPH 62mm. W

TIEFEL PATEN TED FEB. 27

R. O. STIBFELf APPARATUS FOR ROLLING TUBES AND TUBULAR BOD IES.

APPLICATION FILED FEB. 27, 1904.

2 SHEETS-SHEET 2.

.l. i 23 i I new 0 a T I 4 5 M g? a H aw UNITED STATES PATENT OFFICE. RALPH CHARLES STIEFEL, or ELLWOOD ITY, PENNsYLvANiA, ASSIGNOR I TO NATIONAL TUBE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

APPARATUS FOR ROLLING TUBES AND TUBULAR BODIES.

Patented Feb. 27, 1906.

Tubes and Tubular Bodies, of which the following is a specification, accompanied by drawmgs.

This invention relates toapparatus for roll-- mg tubes and tubular bodies; and its objects are to improve upon such machines with the during the piercing process.

Further objects of the invention will hereinafter appear; and to these ends the invention consists of apparatusfor carrying out the above objects, embodying the features of construction,combinations of elements, and arrangement of parts having the general mode of operation substantially as hereinafter fully described and claimedin this specification and shown in the accompanying drawings, in which Figure 1 is a top plan view of apparatus embodyingthe'inventiom Fig. 2 is a transverse sectional view on the line a: as of Fig. '1. Fig. 3 is a rear elevation of the apparatus, partly in section on the longitudinal axis of the mill. Fig. 4 is a diagrammatic view showing the displacement of the metal as the billet is pierced. Fig. 5 is an-elevation of one of the rolls, showing its disposition relatively to the pass.

Referring to the drawings, the rolls A are mounted on shafts B, carried in the bearings A and provided with the driven bevel-gears C, operated by the driving bevel-gears D on the shafts E, held in bearings F. The shafts E are suitably driven from the counter-shaft G by the gearing, as shown, suitably arranged to operate the rolls A in the required direction. The driven gears C and the rolls A, as

shown,have common axes,while the driving gears D have a common axis which lies in the same plane with the center line of the pass a it and at substantially right angles to said line. In order to obtain the required conditions in bevel-gear drives, it is also necessary that the axis of the gears D shall intersect the axes of the rolls.

'The roll-housings H have circular bases I and are seated in sliding frames J. The rollhousings H are adjustable in their circular seats around the axis of the driving-rolls D in order to give the roll-axes the required 0bliquity in relation to the pass. When the obliquity of the rolls is adjusted by swinging said roll-housings around the axis of the shafts E E, it will be noted that the points of intersection 14 14 of the longitudinal axis of the machine with the surfaces of the rolls remain stationary relatively to the center line. of the pass m as. aim of eliminating undue strains on the metal The sliding frames J are seated in'the main bed K and are held in their seats by suitable guideplates L, bolted to the mainbed. The 7 bolts 0 are for securely fastening the rollhousings to the sliding frames after the rolls have received the proper angular adjustment. Suitable means are provided for varying the width of the pass by means of worms P and worm-wheels Q, on the screws R, the mechanism being so contrived that operation of the hand-wheels S slides the frames J "relatively to the pass in order to vary the opening be tween the rolls for the admission of different sizes of billets to be pierced.

By referring to Fig. 1 it will be seen that the displacement of the metal of the billet is very different from that in ordinary machines for working metal, inasmuch as the metal has to be displaced from the center of the billet toward the outside, which results in more violent strains than in ordinary metal forging or rolling processes where the metal generally is compressed from the outside toward the center as it is acted upon by the hammer dies or rolls. important thatthe eflect of the piercing-rolls be such as to aid instead of resist the natural fldw of the metal under operation during the piercing process in order to not unnecessarily increase the already severe strains naturally accruing in this method of displacing metal.

As the solid billet T, Fig. 4, advances between the rolls A in the direction of the ar- It is therefore very row a it first meets the rolls at the points I) l).

IOO

tively to the rolls that the transverse section of the metal of the billet formed between the mandrel and the rolls is constantly reduced in areaas the billet advances over the man' 5'. drel inthe diverging ortion' of the pass.

greater asithesectional area is smaller, so as and d 1.,- Such a condition of affairs would result in strains in the metal in addition to ing reduction of area of the billet.

rangement andshape of the rolls according in, -shafts, the axes 'cfwhieh liein a line pergpendicular to and intersectin thev ass, said, iroll-sh fts being mounted oblique y to the to'i-this invention'are such as toproduce a progressively-increasing feeding efiect as the i a is theanglenf obliquity of the roll rela-- tively to the pass, and/t, kyand I represent.

not to obstruct the natural flow of the metal. The same conditions should obtainwhilethe billet advances from c c to d d. If the rolls were of such shape and disposition as to produce the same feed efiect at all points o'f'contact with the'billet, the rolls would have the tendency of feeding or advancing'much more metal at b 12 than at c c and d d on account of the largesectional area at b btending to adv p ing-shafts, the axes of which he in a line pervaries as fast-as the much smaller area at c those which would occur if there was no effect of obstructing the natural flow ofthe metal corresponding to the progressively-increassectional area of the billet'is reduced.

In Fig. 5, g 9 represents the center line of thepass, and h h the center line of the roll.

three contact-points between the roll and billeti m, k 0, and l g represent-the developments ofjthe roll circumference through represent the feed efiects or speeds of-advancement as produced by the roll atlthe dii ferent contact-points. "It will be seen that 0 p is greater thanm n, while q 1- is greaterthan 0 a), or, in other words, the feed effect of these r0 ls is increasin as the billet progresses durin the same. r0 ls which fillthe followin combined: first, continuous two conditions y mcreasmg in diameter in the same direction that the billet progresses between the rolls; second, the fee ing or advancing of the billet from the small end toward the large end of the rolls, resulting from the universal an ular position of the axes of the rolls relative y to the axis of the ass. .v

Obviouslysome features of this invention may be used without others, and the inven- F011 may be embodied in widely-varying orms.

Therefore, without limiting the invention to the constructions shown and described nor means f r adjusting The a r-- said driving-shaft axes;

gsaid drivin shefts, r; ck about th and drivin shafts and t e driving-shafts;

said contact-points, while m n, 0 p, and g r;

:said driving-shafts, housings in his result is obtained with enumerating equivalents, Igclaiin, and desire tosecure by Letters Patent, the following:

,. '1.-I' n .a rolling-mill, .the combination of two-rolls forming a converging and a diverging pass, and a piercing or expaigding-mans emg sym-' greater feeding effects-at .the diverging por tion of the pass. r

2. In a rolling-mill, rolls, roll-shafts, drivingshafts, the axes of which lie in a line perpendicular to and intersecting the pass, said roll-shafts being mounted obliquely to the said driving-shaftsand having driving con-" nections therefrom, and means for'adjustin the roll-shaftsabdut the axes of the sai 'driving shafts.

3. In a ung-min, rtl1s, rell-shafts, drivpendicular to and intersecting the pass, said 1r ll-shafts being Inrunte d tbliquely to .the said driving-shafts and having bevel-gear fc nnectipns with the driving-shafts, and he rtll-shafts about the ,4. In a a Hing-mill, ans, rtll shafts', a

housings mounted to connectlons between the roll- 5. In a rollingmil rolls, roll-shafts, drive driving-shaft axes as centers,

ing shafts, the axes of which lie in a line per- 7 pendicularto. and intersecting the ass, said to the roll-shafts. being mounted oblique 1g w ich' the said roll-shafts are mounted, driving connections betweenthe roll-shafts and the drivingshafts, and means for adjusting the housings "along the axial line of'thedrivin -shafts.

. 6. In a rolling millyrolls, roll-shafts, driving-shafts, the axes of which lie in lpendicul'ar to and intersectingthe pass, said 'roll-shaftsbeingmounted obliquely-to the said driving-shafts, housings in which the a line persaid roll-shafts are mounted, driving connections betweenthe roll-shafts and the driving shafts, and screw' bonnections for adjusting said housings along the axial line of the drivin shafts.

n testimony whereof I have signed thisspecification 1n the presence of two subscribing witnesses.

. RALPH CHARLES S'IIEFEL.

Witnesses: 1

SAML. A. ROELOFS,- HARRY FINEBERG. 

